| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: batman-adv: fix error handling\n\nSyzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was\nin wrong error handling in batadv_mesh_init().\n\nBefore this patch batadv_mesh_init() was calling batadv_mesh_free() in case\nof any batadv_*_init() calls failure. This approach may work well, when\nthere is some kind of indicator, which can tell which parts of batadv are\ninitialized; but there isn't any.\n\nAll written above lead to cleaning up uninitialized fields. Even if we hide\nODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit\nGPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1]\n\nTo fix these bugs we can unwind batadv_*_init() calls one by one.\nIt is good approach for 2 reasons: 1) It fixes bugs on error handling\npath 2) It improves the performance, since we won't call unneeded\nbatadv_*_free() functions.\n\nSo, this patch makes all batadv_*_init() clean up all allocated memory\nbefore returning with an error to no call correspoing batadv_*_free()\nand open-codes batadv_mesh_free() with proper order to avoid touching\nuninitialized fields." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/batman-adv/bridge_loop_avoidance.c", |
| "net/batman-adv/main.c", |
| "net/batman-adv/network-coding.c", |
| "net/batman-adv/translation-table.c" |
| ], |
| "versions": [ |
| { |
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| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", |
| "lessThan": "07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20", |
| "status": "affected", |
| "versionType": "git" |
| }, |
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| "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", |
| "lessThan": "e50f957652190b5a88a8ebce7e5ab14ebd0d3f00", |
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| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", |
| "lessThan": "b0a2cd38553c77928ef1646ed1518486b1e70ae8", |
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| }, |
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| "lessThan": "6f68cd634856f8ca93bafd623ba5357e0f648c68", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/batman-adv/bridge_loop_avoidance.c", |
| "net/batman-adv/main.c", |
| "net/batman-adv/network-coding.c", |
| "net/batman-adv/translation-table.c" |
| ], |
| "versions": [ |
| { |
| "version": "2.6.38", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "2.6.38", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.4.293", |
| "lessThanOrEqual": "4.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.9.289", |
| "lessThanOrEqual": "4.9.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.254", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.215", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.157", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.77", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.14.16", |
| "lessThanOrEqual": "5.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| "versionEndExcluding": "4.4.293" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| } |
| ] |
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| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/0c6b199f09be489c48622537a550787fc80aea73" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e50f957652190b5a88a8ebce7e5ab14ebd0d3f00" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/fbf150b16a3635634b7dfb7f229d8fcd643c6c51" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6422e8471890273994fe8cc6d452b0dcd2c9483e" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b0a2cd38553c77928ef1646ed1518486b1e70ae8" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/a8f7359259dd5923adc6129284fdad12fc5db347" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6f68cd634856f8ca93bafd623ba5357e0f648c68" |
| } |
| ], |
| "title": "net: batman-adv: fix error handling", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47482", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
